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12路LED灯，每路输出3.5V 4.5A 12个LED还要能够单独控制每一路灯。有好的方案推荐吗？支持PWM调光
感谢回复，单路功耗低的，外围电路不复杂的芯片有不？
输入24V 尽量少用芯片，节约成本
